Showing structure for methyl (3z,3as,5as,6r,7r,9as,9bs)-3-[(3e,5e,7e)-6,10-dimethylundeca-3,5,7,9-tetraen-2-ylidene]-7-hydroxy-3a,6,9a-trimethyl-2-oxo-octahydrocyclopenta[a]naphthalene-6-carboxylate